词语大全 natural weight中文翻譯

Posted 2022-08-13 阻尼

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词语大全 natural weight中文翻譯

Considering the nonuniqueness and instabipty of ultrasonic puterized tomography for structural concrete as well as the ultrasonic transmission characteristics in concrete , a natural weight matrix with dear physical meaning was introduced in the inverse algorithm
摘要針對混凝土超聲波層析成像結果不唯一和穩定性差的問題，首先依據超聲波在混凝土中的傳播特點，在反演算法中引入物理意義明確的自然權矩陣，對走時較小的射線和射線較密的成像單元加以重權。

Different algorithms were pared in the numerical simulation and model experiment of concrete velocity inversion the results showed that , pared with the least - square solutions and the damped least - square solutions , the damped and natural weighted least - square solutions reflected the inner defections of the tested object more repably and exactly due to the usage of correct priori information , which benefited the suppression of noises and made the iterations of inverse stable and convergent
結果表明，相對于最小二乘法和阻尼最小二乘法，基于自然權的加權阻尼最小二乘算法，由于利用了正確的先驗信息，不但使反演過程收斂，而且具有數值穩定、抗噪能力強的優點，其成像結果能真實有效地反映對象內部缺陷，因此更適用于混凝土的超聲波速度反演。

Compared with straight ray tracing , inversion of bending ray tracing is better when data of test are accurate . on the other hand , natural weight is introduced and numerical simulations and experiments of wlm on inversion of velocity and attenuation are also made , which show that wlm , with resistance of noises and convergence of iteration , may get good re - construction images
本文引入了物理意義明確的自然權，對基于自然權的加權阻尼最小二乘反演算法( wlm )在速度反演、衰減反演中進行了數值模擬和試驗研究，結果表明wlm均能獲得良好的重建圖像，迭代收斂，抗噪能力強。